49 lines
1.5 KiB
TypeScript
49 lines
1.5 KiB
TypeScript
import { ENCRYPT_KEY, ENCRYPT_IV } from './../consts/consts';
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import { Context } from 'egg';
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const crypto = require('crypto');
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const isJSON = require('koa-is-json');
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function aesEncrypt(data, key, iv) {
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const cipher = crypto.createCipheriv('aes-192-cbc', key, iv);
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var crypted = cipher.update(data, 'utf8', 'hex');
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crypted += cipher.final('hex');
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return crypted;
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}
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function aesDecrypt(data, key, iv) {
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const decipher = crypto.createDecipheriv('aes-192-cbc', key, iv);
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var decrypted = decipher.update(data, 'hex', 'utf8');
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decrypted += decipher.final('utf8');
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return decrypted;
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}
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module.exports = options => {
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return async function parmsDecode(ctx: Context, next) {
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if (options.threshold && ctx.length < options.threshold) return;
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let reqBody = ctx.request.body;
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if (!reqBody.data) return;
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if (isJSON(reqBody)) {
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let encodeStr = aesEncrypt(JSON.stringify(reqBody), ENCRYPT_KEY, ENCRYPT_IV);
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console.log(`encoded str: ${encodeStr}`);
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}
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let decodeStr = aesDecrypt(reqBody.data, ENCRYPT_KEY, ENCRYPT_IV);
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try {
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ctx.request.body = JSON.parse(decodeStr);
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} catch (e) {
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console.error('parms parse err');
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}
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await next();
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let resBody = ctx.body;
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console.log('return value:', resBody);
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if (isJSON(resBody)) {
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ctx.body = {result: aesEncrypt(JSON.stringify(resBody), ENCRYPT_KEY, ENCRYPT_IV)};
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} else {
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ctx.body = {result: aesEncrypt(JSON.stringify({status: 3, data: 'internal err'}), ENCRYPT_KEY, ENCRYPT_IV)};
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}
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}
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}
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